Production of hydrogen from hydrogen sulfide with perovskite type catalysts: LaMO3

Güldal, N.Ö.; Figen, Halit Eren; Baykara, S.Z.

doi:10.1016/j.cej.2016.11.057

Cited by 67 publications

(29 citation statements)

References 41 publications

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“…Maximum conversion of H 2 S to H 2 by metal sulfides obtained was 80.33% at temperature 788°C . The highest conversion of H 2 S to H 2 by perovskite‐type catalysts obtained was 35.7% at 950°C . Therefore, Pt is a perfect catalyst for this reaction.…”

Section: Resultsmentioning

confidence: 85%

“…This shows that hydrogen production from hydrogen sulfide on Pt surface is faster and easier than this reaction on Ni surface. H 2 S decomposition over various metal sulfides starts at temperatures above 600 • C. 20 Maximum conversion of H 2 S to H 2 by metal sulfides obtained was 80.33% at temperature 788 • C. 21,22,41 The highest conversion of H 2 S to H 2 by perovskite-type catalysts obtained was 35.7% at 950 • C. 23,24 Therefore, Pt is a perfect catalyst for this reaction. This catalyst makes the reaction very fast and it does not need high temperatures to complete the reaction.…”

Section: Resultsmentioning

confidence: 95%

“…Their studies showed metal sulfides are the effective catalysts at temperatures above 873 K. Xu and coworkers studied decomposition of H 2 S over some metal sulfides microwave catalysts. Maximum conversion of H 2 S obtained was 80.33% under microwave irradiation at temperature 1061 K. Also, perovskite‐type catalysts were used to convert H 2 S to H 2 . La 2 SrO x gave the highest conversion of 35.7% at 1223K.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic study of hydrogen sulfide decomposition on Pt(111) surface

Mohamadi

Bashiri

2019

Int J of Chemical Kinetics

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In this work, kinetic of H2S conversion to H2 molecule on the surface of Pt(111) is studied using kinetic Monte Carlo simulation. The results of simulation were fitted to the experimental temperature‐programed desorption spectra. The good agreement between the empirical and the simulated data confirms the proposed mechanism and kinetic data (activated energies and pre‐exponential factors). The influence of variables such as temperature and concentrations of H2S and H2 on the overall results of hydrogen production is studied. The condition is proposed in which the best yield of reaction at minimum temperature is obtained. Results show that platinum is a perfect catalyst for converting H2S to H2 and it has a perfect performance (98%) after 5 μs at low temperature of 227°C.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Kinetic study of hydrogen sulfide decomposition on Pt(111) surface

Mohamadi

Bashiri

2019

Int J of Chemical Kinetics

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“…[97] Figure 11 shows the H 2 Sc onversion and yields of H 2 and S 2 with af eed stream composed of 5mol %H 2 Sa nd 95 mol %A ru nder 1bar pressurea td ifferentt emperatures, which are fitted by the computed time profiles based on the proposed mechanisms. [97,98] Because highert emperatures (above1 200 8C) are required to obtain an H 2 yield above 30 %, [99] La 2 SrO x was used as an effective catalyst to decrease the temperature to 950 8Ct oo btain the highest conversion of 35.7 %f or the decomposition of H 2 S. [100] The resultsf rom the laboratory-scale extraction pilot plant unit for the separation of H 2 Sf rom Black Sea deep water enabled the buildingo fa ni ndustrial extraction pilot plant to concentrate H 2 Sf rom 10 ppm to above 10 000 ppm. [101] The processing of 10 9 m 3 of water containing 10 ppm H 2 Sw ould produce only 0.833 tons of H 2 .…”

Section: Hydrogenfrom Black Sea Deep Watermentioning

confidence: 99%

Fuel Production from Seawater and Fuel Cells Using Seawater

2017

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Seawater is the most abundant resource on our planet and fuel production from seawater has the notable advantage that it would not compete with growing demands for pure water. This Review focuses on the production of fuels from seawater and their direct use in fuel cells. Electrolysis of seawater under appropriate conditions affords hydrogen and dioxygen with 100 % faradaic efficiency without oxidation of chloride. Photoelectrocatalytic production of hydrogen from seawater provides a promising way to produce hydrogen with low cost and high efficiency. Microbial solar cells (MSCs) that use biofilms produced in seawater can generate electricity from sunlight without additional fuel because the products of photosynthesis can be utilized as electrode reactants, whereas the electrode products can be utilized as photosynthetic reactants. Another important source for hydrogen is hydrogen sulfide, which is abundantly found in Black Sea deep water. Hydrogen produced by electrolysis of Black Sea deep water can also be used in hydrogen fuel cells. Production of a fuel and its direct use in a fuel cell has been made possible for the first time by a combination of photocatalytic production of hydrogen peroxide from seawater and dioxygen in the air and its direct use in one‐compartment hydrogen peroxide fuel cells to obtain electric power.

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“…To attain higher conversions using realistic reactor sizes and residence times, catalysts are generally applied to accelerate this kinetically limited process [5][6][7][8][9][10][11]. However, the thermodynamic forces of the thermolysis process are unaffected by the catalysts and strongly limits the overall process.…”

Section: Introductionmentioning

confidence: 99%

Material screening for two-step thermochemical splitting of H₂S using metal sulfide

et al. 2019

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Associated with the rise in energy demand is the increase in the amount of H2S evolved to the environment. H2S is toxic and dangerous to life and the environment, thus, the need to develop efficient and costeffective ways of disposing of the H2S gas has become all-important. To this end, a two-step thermochemical H2S splitting cycle is proposed in this work which does more than just getting rid of the toxic gas but has the potential to produce valuable H2 gas as well as store the solar heat energy. Studies have proved that the type of material used, such as metal sulfides, is critical to the efficiency of this thermochemical splitting process. As follows, this study focuses on establishing a criterion to aid in selecting favorable metal sulfides for application and further development in the H2S thermochemical decomposition sphere. Using a computational approach, via the HSC Chemistry 8®, evaluations such as the equilibrium yield from the sulfurization and decomposition reaction steps, the temperature required for reaction spontaneity, and the Reversibility Index were determined. Investigations proved that sulfides of Zirconium, Niobium, and Nickel were auspicious candidates for the thermochemical decomposition.

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Production of hydrogen from hydrogen sulfide with perovskite type catalysts: LaMO3

Cited by 67 publications

References 41 publications

Kinetic study of hydrogen sulfide decomposition on Pt(111) surface

Kinetic study of hydrogen sulfide decomposition on Pt(111) surface

Fuel Production from Seawater and Fuel Cells Using Seawater

Material screening for two-step thermochemical splitting of H₂S using metal sulfide

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Production of hydrogen from hydrogen sulfide with perovskite type catalysts: LaMO3

Cited by 67 publications

References 41 publications

Kinetic study of hydrogen sulfide decomposition on Pt(111) surface

Kinetic study of hydrogen sulfide decomposition on Pt(111) surface

Fuel Production from Seawater and Fuel Cells Using Seawater

Material screening for two-step thermochemical splitting of H2S using metal sulfide

Contact Info

Product

Resources

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Material screening for two-step thermochemical splitting of H₂S using metal sulfide